/*
    BEEM is a videoconference application on the Android Platform.

    Copyright (C) 2009 by Frederic-Charles Barthelery,
                          Jean-Manuel Da Silva,
                          Nikita Kozlov,
                          Philippe Lago,
                          Jean Baptiste Vergely,
                          Vincent Veronis.

    This file is part of BEEM.

    BEEM is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    BEEM is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with BEEM.  If not, see <http://www.gnu.org/licenses/>.

    Please send bug reports with examples or suggestions to
    contact@beem-project.com or http://dev.beem-project.com/

    Epitech, hereby disclaims all copyright interest in the program "Beem"
    written by Frederic-Charles Barthelery,
               Jean-Manuel Da Silva,
               Nikita Kozlov,
               Philippe Lago,
               Jean Baptiste Vergely,
               Vincent Veronis.

    Nicolas Sadirac, November 26, 2009
    President of Epitech.

    Flavien Astraud, November 26, 2009
    Head of the EIP Laboratory.

 */
package com.beem.project.beem.service;

import android.os.AsyncTask;
import android.os.RemoteException;
import android.util.Log;
import com.beem.project.beem.service.aidl.IXmppConnection;
import com.beem.project.beem.service.aidl.IXmppFacade;

/**
 * This is an asynchronous task that will launch a connection to the XMPP
 * server.
 * 
 * @see android.os.AsyncTask
 * @author Da Risk <da_risk@elyzion.net>
 */
public class LoginAsyncTask extends AsyncTask<IXmppFacade, Integer, Boolean> {

	/**
	 * State of a running connection.
	 */
	public static final int STATE_CONNECTION_RUNNING = 0;
	/**
	 * State of an already connected connection but authentication is running.
	 */
	public static final int STATE_LOGIN_RUNNING = 1;
	/**
	 * State of a connected and authenticated succesfully.
	 */
	public static final int STATE_LOGIN_SUCCESS = 2;
	/**
	 * State of a connected but failed authentication.
	 */
	public static final int STATE_LOGIN_FAILED = 3;

	private static final String TAG = "BeemLoginTask";

	private IXmppConnection mConnection;
	private String mErrorMessage;

	/**
	 * Constructor.
	 */
	public LoginAsyncTask() {
	}

	@Override
	protected Boolean doInBackground(IXmppFacade... params) {
		boolean result = true;
		IXmppFacade facade = params[0];
		try {
			publishProgress(STATE_CONNECTION_RUNNING);
			mConnection = facade.createConnection();
			if (!mConnection.connect()) {
				mErrorMessage = mConnection.getErrorMessage();
				return false;
			}
			publishProgress(STATE_LOGIN_RUNNING);

			if (!mConnection.login()) {
				mErrorMessage = mConnection.getErrorMessage();
				publishProgress(STATE_LOGIN_FAILED);
				return false;
			}
			publishProgress(STATE_LOGIN_SUCCESS);
		} catch (RemoteException e) {
			mErrorMessage = "Exception during connection :" + e;
			result = false;
		}
		return result;
	}

	/**
	 * Make sur to call the parent method when overriding this method.
	 */
	@Override
	protected void onCancelled() {
		try {
			if (mConnection != null && mConnection.isAuthentificated()) {
				mConnection.disconnect();
			}
		} catch (RemoteException e) {
			Log.d(TAG, "Remote exception", e);
		}
	}

	/**
	 * Get the error Message.
	 * 
	 * @return the error message. null if no error
	 */
	public String getErrorMessage() {
		return mErrorMessage;
	}
}
